Questions tagged [audio]
Audio refers broadly to the information, be it acoustic or electronic, entering, traversing, or exiting some medium.
475
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How do I turn audio into video (that is, show the waveforms in a video)?
I have to create a video. Part of it involves "showing" a radio interview. Rather than just having a black screen and listening to the audio, I'd like to have a varying waveform on the screen and a ...
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3
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How to fade in/out a video/audio clip with unknown duration?
I'm working on a project where I'm using ffmpeg to batch convert some video files, and adding fade in/out effects at the head and tail of each clip.
I've been using this bit of code to add the fade/...
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18
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3
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Adobe Premiere - Restore Audio to A/V Clip After Deleting
Say I add a bunch of Audio/Video clips to a sequence, then delete all the audio (Alt-select it and delete); I work on it for some time, close Premiere, re-open.. etc.,
Is there any way to restore the ...
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Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
I am using below command to push the video to Wowza server, since we are pushing raw H.264 video, the RTP packet does not have the timestamp, and we could observe audio video sync issue while playing ...
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16
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3
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What is KeyInt and min-keyint and no-scenecut
I am absolutely new to video processing, I am building a video streaming site and worked with ffmpeg to generate the formats I need for ShakaPackager.
Sadly I don't understand some of the options ...
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8
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3
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What is the best way to plan and sync voiceover?
I'm working on an informational video which has some live action product shots, animation created in flash, a backgroud music track, and a voiceover track.
I've got total control over everything so I ...
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Places to look for sound tracks for videos
I'm wondering what's a good place to look for background music for our video productions.
I'm not asking for a free one, but for any good place with a good categorization of soundtracks and songs for ...
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7
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Can video have multiple streams (like it has 2 audio streams)
Is that possible, that a video (.mp4 or etc) had two video streams and we could to do work with each stream individually ? (like we do with 2 audio streams and we can remove any of them)..
if so:
1) ...
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7
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1
answer
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Will Compression/Format of Audio Change when Uploaded to YouTube?
If I have a .wav audio file, put it in a video file, say a .wmv, as, if I'm not mistaken, that format basically just uses .wav for its audio, and upload said .wmv file to YouTube, will the compression ...
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7
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Most-efficient inexpensive way to speed/slow video track to sync with audio track?
My machines are a few Android tablets (not the newest, but not too old either) as well as a Mac running OS X 10.9.5 (not about to upgrade the OS - long and irrelevant story why). Sometimes I do a ...
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What's the benefit of using an external audio recorder compared to an internal one?
Lately, my friends have been prompting me to buy an external audio recorder. They said that the quality of the sound is way better. I have always been using the internal audio recorder of my DSLR.
As ...
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6
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3
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How to make a video from a still image and an audio file?
I have an image file (png) and an audio file (aiff). How do I combine them to make a video file that shows the still image and plays the audio file?
Target operating system: either OS X Lion or ...
- 308
6
votes
1
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ffmpeg concat introduces a/v sync problem
I have one 2-hour video file and want to add a 10-second title sequence to its start. The long file has perfect a/v sync from start to finish. However, when I use ffmpeg -f concat -i mylist.txt -c ...
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Video desyncs with the audio over time
I record footage with OBS and do voiceovers recorded in audacity. I process the audio in audacity, then sync the audio with the video. However, since I started doing it this way, the audio and video ...
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Do I need an audio recorder?
I'm just starting out...I'm learning to work with Adobe Premier Pro, and I just bought a Snowball/Blue microphone and am learning to record audios with Adobe Audio. I haven't even bought a video ...
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3
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Transcription Methods/Times
I figured I'd leave a question here while I did the manual labor, but what do you find is the best way to transcribe footage?
I'm an editor and the first thing I like to do is create a script of ...
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5
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2
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How do I change the audio on a H.264 MP4 without re-rendering the file?
Is there any way to swap out the audio track on a rendered H.264 MPEG-4 without having to re-render the entire video project? Can this be done with Premiere, MPEG Streamclip, ffmpeg, or some other ...
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2
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Premiere Pro doesn't play AC3 audio stream from .MTS file
I have video clips from two cameras. They were recorded in AVCHD, which I've imported as .MTS in Adobe Premiere Pro.
The clips taken from one camera works fine. The others don't play audio.
I've ...
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Normalizing audio output loudness (LKFS/LUFS) in DaVinci Resolve 16
DaVinci Resolve 16 adds a great feature that allows applying "Normalize audio levels" on a clip using the ITU BS.1770 or EBU R128 standards, to a target level of -23 LKFS/LUFS, or similar.
However, ...
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FFMPEG demux concat dropping audio at stitch points
I am trying to use FFMPEG (v.3.3.3) concat demuxer and as the file is stitched the audio drops at concat points. As I have files of same codecs, bitrates and so on - it doesn't make much sense to ...
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4
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ffmpeg: Normalize audio in an avi file
Ι have an avi file that has different levels of audio. Is there a way to decrease and increase appropriately where needed the audio of my file using ffmpeg?
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FFMPEG: Loop video to the length of audio
E.g. if video is 1 minute, but audio is 1 hour. Make video loop throughout for 1 hour of the audio track.
I use this solution to loop image through the lenght of the audio
ffmpeg -y -loop 1 -r 6 -i ...
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4
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3
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How to detect and extract words from audio/video stream online in a webpage itself?
I have a video (or audio, I think it is not important) stream/file which does not contain subtitles. But it has clean english speech. Is it possible to detect and extract words from it. I don't need ...
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4
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2
answers
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How do I remove audio from all files in a directory with ffmpeg?
I have a directory full of short video clips in .AVI format, and I want to remove the audio from all of them. I'm using Ubuntu 12.04.
I tried this command:
find -name '*.avi' -exec ffmpeg -i {} -an -...
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4
votes
1
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Loudness control LUFS level adjustments
Is there a tool that can adjust the loudness level of a video?
for example I need to make the loudness to be -23 LUFS with max deviation of 0.5 lu.
is there a simple tool/cloud service that doesn't ...
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4
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3
answers
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Effective working at audio/video editing sessions (avoid fatigue making steady progress)
Background
I've just completed an editing project to produce video highlights of an awards evening for my local community radio station. It was a voluntary non-paid project and I'm very pleased the ...
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4
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3
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113
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How to make a video from a still image and an audio file?
I have an image file (png) and an audio file (aiff). How do I combine them to make a video file that shows the still image and plays the audio file?
Target operating system: either OS X Lion or ...
jimbojw
4
votes
2
answers
34
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Transcription Methods/Times
I figured I'd leave a question here while I did the manual labor, but what do you find is the best way to transcribe footage?
I'm an editor and the first thing I like to do is create a script of ...
user1159454
4
votes
5
answers
452
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What equipment should I get for starting out making professional quality films?
I want to start two short film projects but I don't know what equipment I need to get a good professional quality result. I've been saving some money so I hope budget is not a problem. Also, what's ...
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4
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1
answer
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What is the typical audio to video sync threshold when it becomes noticeable? [duplicate]
At what point does audio / video delay become noticeable or is there a general industry standard threshold?
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4
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2
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I want to add video noise/grain based on an audio track?
Does anyone know of a plugin that would allow me to add video noise that is based on an audio track ?
Anything at all that would let me do this would be fantastic.
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4
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2
answers
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Premiere CC 2015 and DVD conversion audio sync issue
Years ago, I transferred a video tape of a live band performance to DVD (using a Sony VHS/DVD RW machine that I no longer own). Yesterday, I edited an 8-minute clip from the DVD. The audio/video sync ...
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4
votes
1
answer
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How to filter out overlapping audio? Given a mixed track and one stem track, what's the best way to "subtract" the stem from the mix?
Given two audio streams, I'd like to remove the audio in one stream that also exists in another. In this particular case the 1st stream contains everything mixed, and the 2nd stream contains just the ...
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Why I can't check the bit rate on some videos?
I've downloaded a video from YouTube, well I've downloaded the video stream and the audio stream of a YouTube video separately. Then with this ffmpeg command ffmpeg -protocol_whitelist "file,http,...
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1
answer
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ffmpeg audio to visualisation
I would like to "convert" audio to video visualisation (oscilloscope or waveform) sort of like some media players have.
I read this thread on how to do so with ffmpeg: How do I turn audio into video ...
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4
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2
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ffmpeg: mute first 2 seconds in all audio streams
Looking to edit a blip out of the beginning of a video/audio file:
How can I use ffmpeg to only edit the first two seconds of the clip so that there's no longer that blip in the audio?
How do I ...
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4
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2
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Bulk/Mass Edit Video Audio?
I have 100 videos that need editing so that I can level the and amplify the audio track. However I do not want to have to extract the mp3 track from each one and edit it then merge it again with the ...
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4
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2
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Proper Microphone for Indoor Use & Filter out Ambient Noise
I'm working on creating some training videos that will cover a single presenter from the waist up, and I'm trying to avoid the microphone being visible while also getting good sound and avoiding ...
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2
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Awful Audio in Video post-render (Premiere Pro CC)
I'm trying out Adobe Premiere Pro CC 2014 and I have a video with three audio tracks. The quality of each track is as follows (listed as the "Source Audio Format" in Premiere):
48,000 Hz 16-bit Mono ...
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1
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Recording Audio for Stand-Up Comedy
I have recently come into producing professional recording of stand-up comedy.
When it comes to capturing audio, I use two sources.
1) a line directly off the mic to get the performer
2) a mic in ...
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4
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Free software to synchronize audio and video recorded at the same time
So I just filmed something using two webcams and a separate audio recorder. This means I have 3 files, 2 video, 1 audio and they all need to be synced and then I need some sort of software which will ...
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Will I lose quality when converting avi to mkv?
I have a lot of *.avi files with either 1 audio track or several. All of them are mp3 encoded. The video codec is xvid4.
However, when I play these avi files I can choose between the audio tracks (...
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1
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Mono to Stereo using FFMPEG
I have an unusual problem that I hope someone can help me solve.
I have 45 video files that I'm batch encoding as MP4.
Some of those files have their audio channel position set to Front L R and others ...
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3
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1
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How to modify audio level of video according to replaygain info?
I have a bunch of music videos I have downloaded from youtube. I usually put them in a playlist in mpc (Media Player Classic). The problem is that the audio levels of the videos are quite different ...
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Audio noise reduction: how does audacity compare to other options?
Audacity's noise reduction filter is pretty good. Before I use it, though, I want to know if I'm missing out on any fundamentally different approaches that may work better.
I have some recordings of ...
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I want to add some audio to the end of a video
I have just created a simple AVI video that contains a small powerpoint slide as an opener, then it does into a timed installation of some software. I have managed to copy and paste the final frame so ...
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Cannot mark my video with CC SA licence because Youtube Content ID found 3rd party soundtrack which itself is CC SA licensed
It seems, I'm in a catch-22 situation. I took a song from Free Music Archive website. I was careful to find a song which does not contain No-Derivatives rule. The licence of the song says:
Attribution-...
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Microphone suggestions or software to avoid background noise in audio
I am afraid this is a bit off topic but I really need to find a microphone recommendation to record home videos without background noise. If this site is not the place and there is a site for ...
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In cartoons, what is created first - video or sounds?
In some modern cartoons the animation of face, particularly mouth, is very realistic - most of vowels are mimicked correctly and on-time by mouth movements. (Particularly I'm talking about Family Guy ...
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1
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Disguising the identity of a voice over
I consider making some kind of tutorial channel on YouTube about a specific subject where I do a voice over on my videos while using an Intuos to demonstrate on the monitor. However, I do not wish the ...
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